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Texas Instruments BQ25040DQCT — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ25040DQCT Li-Ion Charger IC, 1.1A Max, 10-WSON

MPNBQ25040DQCT
Active

Texas Instruments BQ25040DQCT, single-cell Li-Ion linear charger IC, 1.1A max programmable charge current, 4.2V battery termination, over-voltage and over-temperature protection, 10-WSON (3x2) package, active production.

$1.9100Ref. price · indicative, final on quote
BQ25040DQCT datasheet
StockContact for availability
MOQ1 pcs
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Specifications

BQ25040DQCT Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.2V
Voltage6.7V
Current - chargingConstant - Programmable
Charge current - max1.1A
Operating temperature0°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Case10-WFDFN Exposed Pad
Number of cells1
Fault protectionOver Temperature, Over Voltage
Battery chemistryLithium Ion

Product details

Single-cell Li-Ion linear charger with 1.1A ceiling

The Texas Instruments BQ25040DQCT is a linear charger IC designed for single-cell Lithium Ion battery packs, terminating at 4.2V. The maximum charge current is programmable up to 1.1A, set by an external resistor — the actual charge current is the designer's call, not a fixed output. The 6.7V supply ceiling means it runs comfortably from a 5V USB rail or a regulated 5V supply, but not from a 12V bus without a step-down preregulator.

Fault protection set and thermal envelope

On-chip fault protection covers over-voltage at the battery pin and over-temperature at the junction.

No official second-source or pin-compatible alternate is listed in the TI portfolio — the BQ25040 family shares the same base number, so a different package variant (e.g., BQ25040DQCR) may be footprint-compatible but should be verified against the BOM position.

Frequently asked questions

What is the charge current of BQ25040DQCT?

The maximum charge current is 1.1A, programmable via an external resistor. The actual current setpoint is determined by the resistor value; the 1.1A figure is the ceiling, not the default.

Is BQ25040DQCT compatible with single cell Li-Ion?

Yes, it is designed for single-cell Lithium Ion batteries with a 4.2V termination voltage.

Does BQ25040DQCT have overvoltage protection?

Yes, the part includes over-voltage protection on the battery pin, along with over-temperature protection.